LONG-TERM TRENDS OF TROPOSPHERIC OZONE IN THE CZECH REPUBLIC, 1993–2018

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00020699%3A_____%2F19%3AN0000043" target="_blank" >RIV/00020699:_____/19:N0000043 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

LONG-TERM TRENDS OF TROPOSPHERIC OZONE IN THE CZECH REPUBLIC, 1993–2018

Popis výsledku v původním jazyce

The regular measurement of tropospheric ozone in the Czech Republic began within the National Air Pollution Monitoring Network operated by the Czech Hydrometeorological Institute in 1993. The longterm trend study is based on the data from the stations with the longest homogeneous data series: Košetice (EMEP, GAW, and ACTRIS) and Svratouch (EMEP), Praha-Libuš (suburban area of the capital Prague) and Churáňov (mountain site). Non-parametric Mann–Kendall method was used for trend evaluation. Slightly decreasing trends in mean annual concentrations were found at mountain and background level in the whole period as well as in the first part (1993–2005). After 2006 no trend was found. The warm period (April–September) displays similar patterns as the whole year at regional and mountain level. In contrast, no trend was found in the whole period at EMEP stations and slightly decreasing tendency at mountain stations in the cold period. The suburban level is characterized by a slightly increasing trend. The difference between mean annual concentrations at regional and suburban stations was smaller in last years. The annual variation is characterized by maxima at the end of spring. According to the current EU air quality legislation, the target value for protection of human health is exceeded when the 8-hour running mean is higher than 120 g.m-3 25 times on average for 3 years. The limit was exceeded at all stations during the period 1993–2005, but at the same time significant drop of high ozone episodes was found. After 2006, the 3-year mean fluctuated around the target limit at all stations. Assessment of the ozone impacts on ecosystems using the AOT40 index suggests that the critical level was exceeded for long periods, not only in the regional areas but almost over the whole of the Czech Republic. In the last decade, the values varied round the requested limit

Název v anglickém jazyce

LONG-TERM TRENDS OF TROPOSPHERIC OZONE IN THE CZECH REPUBLIC, 1993–2018

Popis výsledku anglicky

The regular measurement of tropospheric ozone in the Czech Republic began within the National Air Pollution Monitoring Network operated by the Czech Hydrometeorological Institute in 1993. The longterm trend study is based on the data from the stations with the longest homogeneous data series: Košetice (EMEP, GAW, and ACTRIS) and Svratouch (EMEP), Praha-Libuš (suburban area of the capital Prague) and Churáňov (mountain site). Non-parametric Mann–Kendall method was used for trend evaluation. Slightly decreasing trends in mean annual concentrations were found at mountain and background level in the whole period as well as in the first part (1993–2005). After 2006 no trend was found. The warm period (April–September) displays similar patterns as the whole year at regional and mountain level. In contrast, no trend was found in the whole period at EMEP stations and slightly decreasing tendency at mountain stations in the cold period. The suburban level is characterized by a slightly increasing trend. The difference between mean annual concentrations at regional and suburban stations was smaller in last years. The annual variation is characterized by maxima at the end of spring. According to the current EU air quality legislation, the target value for protection of human health is exceeded when the 8-hour running mean is higher than 120 g.m-3 25 times on average for 3 years. The limit was exceeded at all stations during the period 1993–2005, but at the same time significant drop of high ozone episodes was found. After 2006, the 3-year mean fluctuated around the target limit at all stations. Assessment of the ozone impacts on ecosystems using the AOT40 index suggests that the critical level was exceeded for long periods, not only in the regional areas but almost over the whole of the Czech Republic. In the last decade, the values varied round the requested limit

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

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Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Air Pollution XXVII

ISBN

978-1-78466-343-8

ISSN

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e-ISSN

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Počet stran výsledku

13

Strana od-do

21-33

Název nakladatele

WIT Press

Místo vydání

Praha

Místo konání akce

Aveiro, Portugal

Datum konání akce

26. 6. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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